getcontour {adehabitat} | R Documentation |
getcontour
computes the contour polygon of a raster object
of class asc
. When the object is made of several parts, the
function returns one polygon per part.
getcontour(x)
x |
an object of class asc |
Returns an object of class area
.
Holes in the polygons are not taken into account by the function.
Clement Calenge clement.calenge@oncfs.gouv.fr
asc
for additionnal information on
objects of class asc
, area
for
additional information on objects of class area
, and
area2dxf
to export the results toward a GIS.
data(puechabon) kasc <- puechabon$kasc ######################################### ## Example with one object: ## Gets the first map of the "kasc" object ## Map of the elevation elev <- getkasc(kasc, "Elevation") image(elev) ## Get the contour polygon cpol <- getcontour(elev) ## Draw the polygon i <- cpol[,2:3] polygon(i, col = "green", lwd = 2) ######################################### ## Example with two objects: ## home ranges of wild boar hr <- getsahrlocs(puechabon$sahr, "hr") u <- getkasc(hr, "Jean") image(u) ## Get the contour polygons p <- getcontour(u) plot(p, lwd = 2)